121202222211 has 144 divisors (see below), whose sum is σ = 224450370144. Its totient is φ = 64942166016.

The previous prime is 121202222203. The next prime is 121202222257. The reversal of 121202222211 is 112222202121.

It is a happy number.

It is not a de Polignac number, because 121202222211 - 2³ = 121202222203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121202222111) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 63356191 + ... + 63358103.

It is an arithmetic number, because the mean of its divisors is an integer number (1558683126).

Almost surely, 2^121202222211 is an apocalyptic number.

121202222211 is a deficient number, since it is larger than the sum of its proper divisors (103248147933).

121202222211 is a wasteful number, since it uses less digits than its factorization.

121202222211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2272 (or 2253 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 121202222211 its reverse (112222202121), we get a palindrome (233424424332).

The spelling of 121202222211 in words is "one hundred twenty-one billion, two hundred two million, two hundred twenty-two thousand, two hundred eleven".